Table 1

Black tea polyphenol database based on the composition of commonly consumed black tea beverages in Arizona

	No. of samples	Average concentration (μg/ml)
	No. of samples			Total flavonoids	Total polyphenols	Catechins	Theaflavins	Thearubigens	Gallic acid	Caffeine
Regular hot black tea^a
Brewed for 1 min	3	417	642	40	0	377	17	145
Brewed for 2–3 min	6	648	997	94	13	546	27	244
Brewed for ≥4 min	3	692	1064	87	15	585	25	215
Diluted hot black tea^b
Brewed for 1 min	2	183	282	10	0	173	3	62
Brewed for 2–3 min	2	222	341	15	0	207	4	79
Brewed for ≥4 min	2	361	555	23	0	338	8	103
Iced black tea beverages
Brewed	10	507	779	74	8	369	18	158
Sun Tea	5	383	589	47	3	333	21	131
Instant	2	96	147	1	0	95	3	30
Restaurant	5	470	724	40	3	425	32	200

^a One tea bag/cup or mug = 0.96 g of tea leaves/100 ml.
^b One tea bag/2 cups or 2 mugs = 0.48 g of tea leaves/100 ml.